diff --git a/lib/messages.js b/lib/messages.js
index 0ec22e0..daa9d2a 100644
--- a/lib/messages.js
+++ b/lib/messages.js
@@ -83,6 +83,10 @@ var randomNonce = bmcrypto.randomBytes(8);
 var version = exports.version = {
   /**
    * @typedef {Object} DecodeResult
+   * @property {number} version - Identifies protocol version being used
+   * by the node. Should equal 3. Nodes should disconnect if the remote
+   * node's version is lower but continue with the connection if it is
+   * higher.
    * @property {Object} services -
    * [Service]{@link module:bitmessage/structs.ServicesBitfield}
    * features to be enabled for this connection